Except for Deoxys (Speed Forme)
Well Deoxys Normal and Deoxys Attack have 150 which is the next highest but not counting any Deoxys. Mewtwo at base 130. Meloetta(Pirouette) is a close second at base 128.
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Mewtwo at base 130. 
Meloetta(Pirouette) is a close second at base 128.